Drive means for a loom element



Aug. 2, 1966 A. KUBELKA ETAL DRIVE MEANS FOR A LOOM ELEMENT Filed March9, 1964 2 Sheets-Sheet l l A A 1 llllllllll I v v '1' INVENTORS Mm 06066Aug. 2, 1966 A. KUBELKA ETAL DRIVE MEANS FOR A LOOM ELEMENT 2Sheets-Sheet 2,

Filed March 9. 1964 goal/1' 6 United States Patent M 3,263,707 DRIVEMEANS FOR A LOOM ELEMENT Alois Kuhelka and Vaclav Opati'il, Brno, andKarel Bubelka, Prague, Czechoslovakia, assignors to Elitex, Stlruzenipodniku textilniho strojirenstvi, Liberec, Czechoslovakia Filed Mar. 9,1964, Ser. No. 350,352 9 Claims. (Cl. 139-122) This invention relates toa loom and especially the drive for the weft carrier between two drivewheels.

The weft carrier is driven by means of two drive wheels and rotatinglevers which penetrate grooves in blocks on the weft carrier, pressagainst the leading surfaces tbof said grooves and thus propel the weftcarrier forward.

An embodiment of the invention is illustrated, by way of example, in theaccompanying drawings, in which:

FIG. 1 is a front view of a loom according to the invention,

FIG. 2 is a sectional view on the line AA of FIG. 1,

FIG. 3 is a sectional view of the rotating arms, and

FIGS. 4 and 5 are front and plan views respectively of the weft carrier.

Referring to the drawings, a flexible elongated Weft darrier 1 iscarried along by a drive wheel 2 by projections 2a. This weft carrier isequipped with a thread catcher 1b of usual design for instance a threadcatcher of the type disclosed in the US. Patent 2,493,515 granted to V.Werner et al. on January 3, 1950. This thread catcher catches the weftthread on one side of the shed carrying it therethrough and releasing iton the other side thereof. On leaving the drive wheel 2 the Weft carrierpasses through a guide means 3 which consists of a plurality of parallelpairs of guide members. The weft carrier moves straight along alignedpairs of grooves 3a thereof which are engaged by a plate In. On itsunderside the weft carrier 1 is provided with small blocks 4 havinggrooves 4a. The blocks 4 are slanted at a predetermined angle, forexample 45, to the longitudinal axis of a shaft 7 and of guide means 3,and the blocks 4 are all disposed at the same angle to the longitudinalaxis of a shaft 7 and parallel to each other.

Two-arm rotating levers 5 pass continuously between the individual pairsof guide members of the guide means 3, enter the grooves 4a, and pressagainst the slanted leading surfaces 4b of the grooves 4a, thusimparting a forward motion to the weft carrier 1. When one rot-atinglever arm 5 has left a groove 4a, after rotating through 180", the otherarm enters the grid and passes through the following groove.

The levers 5 are protected by a casing 6 (FIG. 3) which is open only intheregion of guide means 3. The various levers 5 are so arranged on ashaft 7 to which they are secured, th-at,. as the shaft 7 rotates, theypass into the guide means 3 and enter in succession one after the otherthe grooves 4a in the blocks 4. The circular shape of casing 6 is bestseen in FIG. 2. A segment of the casing is omitted, forming an openingthrough which the ends of arms 5 project into grooves 4a. 7

When the machine is at rest, some of the rotating arms always remain ingrooves 4a of the blocks 4, pressing against the rear wall of the grooveand providing a braking effect.

The upper and lower shafts 7 are driven by meshing gears 8a, 8b fromshaft 8, gears 9 and a shaft 10 driven by an electric motor (not shown)Shafts 11 which drive the wheels 2 are also driven from the shaft 8 by apair of meshing gears 80.

Drive members 5 are disposed equidistant along shafts 7, not all members5 being shown. The abutment faces and grooves 4a are spaced the samedistance as members 5.

3,263,797 Patented August 2, 1966 The weft thread is inserted into theweft carrier 1 when the same is still engaged by wheel 2 on the rightside of FIG. 1. A spring-loaded clamp on the weft carrier catches theweft thread and pulls it through the shed shown in FIG. 3. The clamp isengaged and opened when carrier 1 has passed through the shed and isengaged and transported by the projections 2a of the left wheel 2.

What we claim is:

1. Weft carrier drive for a loom, comprising, in combination, aplurality of rotary :drive members rotatable about an axis and spacedfrom each other along the same, each drive member being movable along acircular path; guide means extending parallel to said axis; and aflexible elongated weft carrier guided along said guide means forinserting a weft into a Warp shed formed by the loom, said weft carrierhaving a plurality of abutment faces spaced in the direction of saidaxis and slanted to the same, said abutment faces being located in thepaths of movement of said rotary drive members and arranged andconstructed so that said slanted abutment faces are engaged insuccession by said drive members whereby said weft carrier is drivenalong said guide means.

2. Weft carrier drive for a loom, comprising, in combination, aplurality of rotary drive members rotatable about an axis and spacedfrom each other along the same, each drive member being movable along acircular path; guide means extending parallel to said axis; and a weftcarrier including a plate guided along said guide means for inserting aweft into a warp shed formed by the loom, said weft carrier having aplurality of blocks secured to said plate, each block being formed witha groove having a pair of abutment faces, said pairs of abutment facesbeing spaced in the direction of said axis and slanted to the same, saidgrooves and said abutment faces being located in the paths of movementof said rotary drive members and arranged and constructed so that saidslanted abutment faces are engaged in succession by said drive memberswhereby said weft carrier is driven along said guide means.

3. Weft carrier drive for a loom, comprising, in combination, aplurality of rotary drive members rotatable about an axis and spacedfrom each other along the same, each drive member being movable valong acircular path; guide means extending parallel to said axis; and aflexible elongated weft carrier guided along said guide means forinserting a weft into a warp shed formed by the loom, said weft carrierhaving a plurality of parallel abutment faces spaced in the direction ofsaid axis and slanted to the same, said abutment faces being located inthe paths of movement of said rotary drive members and arranged andconstructed so that said slanted abutment faces are engaged insuccession by said drive members whereby said weft carrier is drivenalong said guide means.

4. Weft carrier drive for a loom, comprising, in combination, aplurality of rotary drive members rotatable about an axis and spacedfrom each other along the same, each drive member being movable along acircular path; guide means extending parallel to said axis; and a weftcarrier including a plate guided along said guide means for inserting aweft into a warp shed formed by the loom, said wet carrier having aplurality of blocks secured to said plate, each block being formed witha groove having a pair of parallel abutment faces, said pairs ofparallel abutment faces being spaced in the direction of said axis andslanted to the same, said grooves and said abutment faces being locatedin the paths of movement of said rotary drive members and arranged andconstructed so that said slanted abutment faces are engaged insuccession by said drive members whereby said weft carrier is drivenalong said guide means.

5. Weft carrier drive for a loomfii comprising, in comprising, incombination, a plurality of rotary drive members rotatable about an axisand spaced from each other along the same, each drive member beingmovable along a circular path, each drive member having two armsangularly spaced 180 degrees and having the same radial length so thateach pair of arms is movable along a circular path located in a planeperpendicular to said axis; guide means extending parallel to said axis;and a weft carrier guided along said guide means for inserting a weftinto a warp shed formed by the loom, said weft carrier having aplurality of abutment faces spaced in the direction of said axis andslanted to the same, said abutment faces being located in the paths ofmovement of said arms and arranged and constructed so that said slantedabutment faces are engaged in succession by said arms whereby said weftcarrier is driven along said guide means.

6. Weft carrier drive for a loom, comprising, in combination, aplurality of rotary drive members rotatable about an axis and spacedfrom each other along the same, each drive member being movable along acircular path, each drive member having two arms angularly spaced 180degrees and having the same radial length so that each pair of arms ismovable along a circular path located in a plane perpendicular to saidaxis; a stationary casing enveloping each drive member, each casinghaving a peripheral opening through which the end portions of said armsproject during rotation; guide means extending parallel to said axis inthe region of said openings of said casings; and a weft carrier guidedalong said guide means for inserting a weft into a warp shed formed bythe loom, said weft carrier having a plurality of abutment faces spacedin the direction of said axis and slanted to the same, said abutmentfaces being located in the paths of movement of said end portions ofsaid arms and arranged and constructed so that said slanted abutmentfaces are engaged in succession by an end portion of one of said armswhereby said weft carrier is driven along said guide means.

7. Weft carrier drive for a loom, comprising, in combination, aplurality of rotary drive members rotatable about an axis and spacedfrom each other along the same, each drive member being movable along acircular path, each drive member having two arms angularly spaced 180degrees and having the same radial length so that each pair of arms ismovable along a circular path located in a plane perpendicular to saidaxis; guide means extending parallel to said axis; and a weft carrierincluding a plate guided along said guide means for inserting a weftinto a warp shed formed by the loom, said weft carrier having aplurality of blocks secured to said plate, each block being formed witha groove having a pair of abutment faces, said pairs of abutment facesbeing spaced in the direction of said axis and slanted to the same, saidgrooves and said abutment faces being located in the paths of movementof said arms and arranged and constructed so that said slanted abutmentfaces are engaged in succession by said arms whereby said weft carrieris driven along said guide means.

8. Weft carrier drive for a loom, comprising, in combination, aplurality of rotary drive members rotatable about an axis and spacedfrom each other along the same, each drive member being movable along acircular path, each drive member having two arms angularly spaceddegrees and having the same radial length so that each pair of arms ismovable along a circular path located in a plane perpendicular to saidaxis; a stationary casing enveloping each drive member, each casinghaving a pcripheral opening through which the end portions of said armsproject during rotation; guide means extending parallel to said axis inthe region of said openings of said casings; and a weft carrierincluding a plate guided along said guide means for inserting a weftinto a warp shed formed by the loom, said Weft carrier having aplurality of blocks secured to said plate, each block being formed witha groove having a pair of parallel abutment faces, said pairs ofparallel abutment faces being spaced in the direction of said axis andslanted to the same, said grooves and said abutment faces being locatedin the paths of movement of said end portions of said arms and arrangedand constructed so that said slanted abutment faces are engaged insuccession by an end portion of one of said arms whereby said weftcarrier is driven along said guide means.

9. Weft carrier drive for a loom, comprising, in combination, aplurality of rotary drive members rotatable about an axis and spacedfrom each other along the same, each drive member being movable along acircular path; guide means extending parallel to said axis; a pair ofdriven transporting wheels, each wheel disposed at one end of said guidemeans and having projections on the periphery thereof; and a weftcarrier being transported by said projections of one of said wheels ontoone end of said guide means, and transported by the projections of theother wheel away from the other end of said guide means, and beingguided along said guide means for.

References Cited by the Examiner FOREIGN PATENTS 11/ 1959 Germany.

OTHER REFERENCES German printed application No. 1,023,424, January 1958.

DONALD W. PARKER, Primary Examiner.

H. S. JAUDON, Assistant Examiner.

1. WEFT CARRIER DRIVE FOR A LOOM, COMPRISING, IN COMBINATION, APLURALITY OF ROTARY DRIVE MEMBERS ROTATABLE ABOUT AN AXIS AND SPACEDFROM EACH OTHER ALONG THE SAME, EACH DRIVE MEMBER BEING MOVABLE ACIRCULAR PATH; GUIDE MEANS EXTENDING PARALLEL TO SAID AXIS; AND AFLEXIBLE ELONGATED WEFT CARRIER GUIDED ALONG SAID GUIDE MEANS FORINSERTING A WEFT INTO A WARP SHED FORMED BY THE LOOM, SAID WEFT CARRIERHAVING A PLURALITY OF ABUTMENT FACES SPACED IN THE DIRECTION OF SAIDAXIS AND SLANTED TO THE SAME, SAID ABUTMENT FACES BEING LOCATED IN THEPATHS OF MOVEMENT OF SAID ROTARY DRIVE MEMBERS AND ARRANGED